CN104564428B - Diaphragm carburetor - Google Patents
Diaphragm carburetor Download PDFInfo
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- CN104564428B CN104564428B CN201410532672.7A CN201410532672A CN104564428B CN 104564428 B CN104564428 B CN 104564428B CN 201410532672 A CN201410532672 A CN 201410532672A CN 104564428 B CN104564428 B CN 104564428B
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- access
- valve
- main body
- air
- gaseous mixture
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
- F02M9/08—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having throttling valves rotatably mounted in the passage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/20—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18
- F02B25/22—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18 by forming air cushion between charge and combustion residues
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B17/00—Engines characterised by means for effecting stratification of charge in cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
- F02M17/10—Carburettors having one or more fuel passages opening in valve-member of air throttle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
- F02M9/02—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having throttling valves, e.g. of piston shape, slidably arranged transversely to the passage
- F02M9/06—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having throttling valves, e.g. of piston shape, slidably arranged transversely to the passage with means for varying cross-sectional area of fuel spray nozzle dependent on throttle position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
- F02M9/08—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having throttling valves rotatably mounted in the passage
- F02M9/085—Fuel spray nozzles in the throttling valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
- F02M9/12—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having other specific means for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
- Means For Warming Up And Starting Carburetors (AREA)
Abstract
Present invention offer is a kind of can to improve accelerating ability in low-speed region and fully supply the single-channel type rotary carburetor of scavenging air in high-speed region.In the carburetor (1) of the present invention, 3 downstream side main body accesses (10b, 11b, 12b) of main body (2) and 3 valve accesses (20,21,22) of valve member (4) can be respectively communicated with, and valve member (4) can rotate between closed position and open position.Carburetor (1) is the single channel type carburetor that main body access (10b, 11b, 12b) and valve access (20,21,22) are each separated by main body partition wall (14,15) and valve partition wall (24,25).When valve member (4) self-closing position is made to rotate to open position, the 2nd main body access (11b) of gaseous mixture first starts to connect with the 1st main body access (10b) of the 2nd valve access (21) than air with the 1st valve access (20), the 3rd main body access (12b) of air and the 3rd valve access (22).
Description
Technical field
The present invention relates to a kind of rotary carburetors applied to two stroke engine, further specifically, are related to one kind
The rotary carburetor of two stroke engine applied to stratiform scavenging type.
Background technology
The two stroke engine of stratiform scavenging type has to supply the mixing of the gaseous mixture of fuel and air to crankcase
Gas access and the air flue for supplying scavenging air to scavenging access.Throttle valve and connection are equipped on gaseous mixture access
There is carburetor.In addition, air valve is equipped on air flue.In the past, it is known that there are one kind to make the throttle valve, air valve and carburetor
Form the diaphragm carburetor of one (for example, referring to patent document 1 and patent document 2).2 institute of patent document 1 and patent document
The diaphragm carburetor of record has main body and so as to the mode of rotation is accommodated in main in vivo valve member, is configured to, makes
When valve member rotates, it will lead to arranged on the gaseous mixture access of main body, air flue and the gaseous mixture access arranged on valve member and air
Road is connected or disconnects, and thus opens or closes throttle valve and air valve.
In patent document 1, a kind of be equipped with is recorded by the mixed gas passage of circular cross-section and the air of circular cross-section to be led to
The dual-channel type diaphragm carburetor for two passages that road is formed.In addition, in patent document 2, record a kind of single channel type
Diaphragm carburetor is equipped in the single-channel type rotary carburetor by the gaseous mixture access of semi-circular cross-section and semicircle section
The two paths that the air flue in face is formed, since two paths are opened by flat divider walls, hence it appear that two
Access constitutes 1 passage.
Patent document 1：No. 7325791 specifications of U.S. Patent No.
Patent document 2：Japanese Unexamined Patent Publication 2006-177352 publications
The content of the invention
Problems to be solved by the invention
In dual-channel type diaphragm carburetor, due to setting there are two passage, main body is made to maximize.In addition, bilateral
The length of channel type diaphragm carburetor is the length of single-channel type rotary carburetor approximately twice as accordingly, there exist binary channels
The rotation stress (friction) that type diaphragm carburetor is subject to is larger and makes the tendency of the throttling burden of work machine side.
Additionally, there are following two requirements, i.e., in order in the low-speed region of engine (in the smaller area of the aperture of throttle valve
Domain) obtain good acceleration and the 1st requirement of the ratio compared with air capacity that increases air-fuel mixture amount and the high speed in engine
Region (throttle valve is the state of standard-sized sheet) is sufficiently fed the 2nd requirement of scavenging air to scavenging access.
In dual-channel type diaphragm carburetor, in order to realize the 1st requirement, by mixed gas passage and air duct
It is not that mixed gas passage is made almost to start simultaneously at air duct to connect when rotating the valve member in the state of disconnection, but
Mixed gas passage is made to start to connect prior to air duct.Specifically, the diameter of mixed gas passage is made to be more than the straight of air duct
Footpath makes the profile of mixed gas passage and the profile deformation of air duct.In the case of for the former, due to ensuring air
Increase the diameter of mixed gas passage in the state of amount, it is therefore, identical with the diameter of mixed gas passage and the diameter of air duct
Situation is compared, and there is the tendency that main body is made to maximize.In addition, in the case of for the latter, the manufacture of main body is complicated, and is deposited
In the tendency that main body is made to maximize.
Single-channel type rotary carburetor is compacter than dual-channel type diaphragm carburetor (with reference to the Fig. 7 being discussed below), but
Become constant tendency (reference in the presence of the ratio in the range of low-speed region to high-speed region between air-fuel mixture amount and air capacity
Fig. 8 being discussed below).In order to realize it is described 1st requirement, i.e., in order to by mixed gas passage and air duct disconnection state make
Valve member makes mixed gas passage start to connect prior to air duct when rotating, for example, blocking the sky of main body using the wall of main body
The entrance and exit of gas passage or the partial enlargement by air duct.However, in the case of for the former, it is empty in high-speed region
When gas passage reaches standard-sized sheet (during throttle full open), the flowing of air is hindered by the wall of main body and detour occurs, so that air
The efficiency of supply reduces and can not achieve the 2nd requirement.In addition, in the case of for the latter, the part after expansion causes sky
The flowing of gas gets muddled and makes the reduction of the air efficiency of supply, thus failing to meet the second requirement.Further, since rotary carburetion
The posture (will be equipped with the engine application of carburetor in the case of work machine, posture of operator etc.) of device, expands
Part afterwards sometimes results in fuel accumulation.In contrast, if being formed rotary carburetion in a manner of realizing the 2nd requirement
Device then can not achieve the 1st requirement.
Thus, in previous single-channel type rotary carburetor, it is difficult to while realization is smaller in the aperture of throttle valve
Low-speed region increase gaseous mixture improves accelerating ability (the 1st requirement) and opening in throttle valve compared with the ratio of air
That spends larger high-speed region increase air fully supplies scavenging air compared with the ratio of gaseous mixture to scavenging access
(the 2nd requirement) the two requirements.
Therefore, it is an object of the present invention to provide it is a kind of can low-speed region increase air-fuel mixture amount compared with air
The ratio of amount and improve accelerating ability and leading in high-speed region increase air capacity compared with the ratio of air-fuel mixture amount to scavenging
Road is sufficiently fed the single-channel type rotary carburetor of scavenging air.
The solution to the problem
In order to realize the purpose, the present invention provides a kind of diaphragm carburetor, is two applied to stratiform scavenging type
The diaphragm carburetor of Stroke Engine, which is characterized in that the diaphragm carburetor includes：Block-like main body has with axis
Columnar hole centered on line；Valve member, with cylindrical shape and so as to the mode of rotation is accommodated in the hole；And
Gasification nozzle unit, along the axis configuration in the valve member, the valve member have along with the axis just
Air the valve access and gaseous mixture valve access of the valve member are run through in the direction of friendship, and the gasification nozzle unit has to institute
State gaseous mixture valve passage opening and for the port of spray fuel, the main body has to be distinguished in the upstream side of the valve member
The upstream side main body access that is connected with the air with valve access and the gaseous mixture with valve access and in the valve member
The downstream side air main body access that downstream side is connected respectively with the air with valve access and the gaseous mixture with valve access
With downstream side gaseous mixture main body access, the valve member can be between the open and the closed positions using the axis in
The heart is rotated, in the open position, the air with valve access and gaseous mixture valve access respectively with the downstream side
Air is connected with main body access with the downstream side gaseous mixture with main body access, and air valve access and described mixed
It closes gas with valve access respectively with the upstream side main body access to be connected, in the closed position, the air valve access and institute
Gaseous mixture valve access is stated respectively with the downstream side air main body access and the downstream side gaseous mixture main body access to break
It opens, and the air is disconnected with valve access and gaseous mixture valve access with the upstream side main body access respectively, it is described
Diaphragm carburetor is following single-channel type rotary carburetor：The air with valve access and gaseous mixture valve access it
Between opened by flat valve divider walls, and the downstream side air is led with main body access and the downstream side gaseous mixture
It is opened between body access by flat main body divider walls, the downstream side air main body access and the air valve lead to
Road is each provided with two, also, the downstream side air is configured with main body access in the downstream side gaseous mixture main body access
The axis direction both sides, the air with valve access configure gaseous mixture valve access the axis direction two
Side sets the downstream side gaseous mixture with main body access and the gaseous mixture with the cross section profile of valve access, so as to
Make the downstream side gaseous mixture main body access and the mixing when valve member self-closing position being made to rotate to open position
Gas valve access first starts to connect than the downstream side air main body access with the air valve access, two downstreams
Side air is consistent with the cross section profile of two air valve accesses with the cross section profile of main body access.
The diaphragm carburetor so formed is following single-channel type rotary carburetor：The air valve access and institute
Gaseous mixture is stated to be opened by flat valve divider walls between valve access, and downstream side air the main body access and institute
Downstream side gaseous mixture is stated to be opened by flat main body divider walls between main body access, therefore than dual-channel type rotaryization
Oily device miniaturization.In addition, the downstream side air is each provided with two with main body access and the air with valve access, also,
The downstream side air is configured with main body access in the axis direction both sides of the downstream side gaseous mixture main body access, institute
The configuration of air valve access is stated in the axis direction both sides of the gaseous mixture valve access, also, due to the downstream
Side gaseous mixture is set with main body access and the gaseous mixture with the cross section profile of valve access, to make the valve member certainly
Closed position makes the downstream side gaseous mixture main body access and the gaseous mixture valve access ratio institute when rotating to open position
It states downstream side air main body access first to start to connect with the air valve access, therefore, it is possible to mixed in low-speed region increase
That closes tolerance improves accelerating ability compared with the ratio of air capacity.Further, since the downstream side air with main body access and
The air is each provided with two with valve access, and the downstream side air is configured with main body access in the downstream side gaseous mixture
With the axis direction both sides of main body access, the air configures the axis direction two in gaseous mixture valve access with valve access
Side, also, two downstream side air are taken turns with the section of the cross section profile of main body access and two air valve accesses
It is wide consistent, thus, it is easy in the ratio compared with air-fuel mixture amount of high-speed region increase air capacity, it can be ensured that smoothly empty
Air-flow is simultaneously sufficiently fed scavenging air to scavenging access.As a result, it is possible to simultaneously realize low-speed region it is described 1st requirement and
The 2nd requirement of high-speed region.
In the technical solution of the diaphragm carburetor of the present invention, it is preferred that air valve access and described mixed
Close the gas compound section profile of valve access and have with on the direction of the axis vertical take-off in a manner of convex form it is curved
Profile, the vertex of the convex form are included in the gaseous mixture in valve access.It may further be preferable that the air valve leads to
Road and the gaseous mixture with the compound section profile of valve access are circular or ellipse.
In the technical solution of the diaphragm carburetor of the present invention, it is preferred that the valve member can be in the hole
Moved along the axis, the valve member self-closing position rise be moved to fully open position until during at least one section when
In, the gaseous mixture is partly connected with valve access with the downstream side main body access.
In the diaphragm carburetor so formed, in the two stroke engine state (not shown) as sub-load
Under, gaseous mixture is by the downstream side main body access and by the confession (not shown) of the scavenging access to two stroke engine (not shown)
It gives.The fuel supply characteristics to two stroke engine supply fuel (not shown) can be controlled using the point, so as to change
Kind accelerating performance prevents that the supply characteristics of fuel is thin in the state of as sub-load.
The present invention diaphragm carburetor technical solution in, the upstream side main body access have respectively with the sky
Gas is led with the upstream side air main body access and upstream side gaseous mixture that valve access is connected with the gaseous mixture with valve access
Body access, can also be by tabular between the upstream side air main body access and the upstream side gaseous mixture main body access
Main body divider walls open, the upstream side main body access can also be the single access for being not provided with partition wall.
In addition, another technical solution of the present invention provides a kind of diaphragm carburetor, it is to be applied in gaseous mixture entrance
Both sides be each provided at least one scavenging access stratiform scavenging type two stroke engine diaphragm carburetor, feature
It is, which includes：Block-like main body has the columnar hole centered on axis；Valve member, tool
There is cylindrical shape and so as to the mode of rotation is accommodated in the hole；And gasification nozzle unit, it is configured along the axis
In the valve member, the valve member has along in the air valve with the direction of the axis vertical take-off through the valve member
Access and gaseous mixture valve access, the gasification nozzle unit have to the gaseous mixture with valve passage opening and for spraying combustion
The port of material, the main body has to be used in the upstream side of the valve member with the air with valve access and the gaseous mixture respectively
Upstream side main body access that valve access is connected and the downstream side of the valve member respectively with the air valve access and institute
State downstream side air main body access and the downstream side gaseous mixture main body access that gaseous mixture is connected with valve access, the valve portion
Part can be pivoted about with the axis between the open and the closed positions, in the open position, the air
With valve access and gaseous mixture valve access respectively with the downstream side air main body access and the downstream side gaseous mixture
Be connected with main body access, and the air with valve access and gaseous mixture valve access respectively with the upstream side main body
Access is connected, in the closed position, the air with valve access and gaseous mixture valve access respectively with the downstream side
Air is disconnected with main body access and the downstream side gaseous mixture main body access, and the air valve access and the mixing
Gas is disconnected with valve access with the upstream side main body access respectively, and the diaphragm carburetor is that following single channel type is rotatably changed
Oily device：The air is opened with valve access and the gaseous mixture between valve access by flat valve divider walls, and institute
It states between downstream side air main body access and the downstream side gaseous mixture main body access by flat main body partition wall point
It separates, the downstream side air is each provided with two with main body access and the air with valve access, also, the downstream side is empty
Gas is configured with main body access in the axis direction both sides of the downstream side gaseous mixture main body access, and the air valve leads to
Road is configured in the gaseous mixture axis direction both sides of valve access.
In the diaphragm carburetor so formed, due to being equipped with downstream in the downstream side gaseous mixture both sides of main body access
Therefore air main body access in side, which is being applied to be each provided at least 1 in the both sides of gaseous mixture entrance
During the two stroke engine of the stratiform scavenging type of a scavenging access, it can make between the diaphragm carburetor and two stroke engine
Piping structure it is simple.Further, since main purpose is to make the structure of piping simple, therefore, it is not necessary to have to meet the described 1st
It is required that and the described 2nd requirement.
The effect of invention
As described above, single-channel type rotary carburetor of the invention can minimize main body, and can be
The accelerating ability that improved compared with the ratio of air capacity of low-speed region increase air-fuel mixture amount simultaneously can be empty in high-speed region increase
Tolerance is sufficiently fed scavenging air compared with the ratio of air-fuel mixture amount to scavenging access.
Description of the drawings
Fig. 1 is the exploded perspective view of the diaphragm carburetor of the present invention.
Fig. 2 is the front section view of the diaphragm carburetor of the present invention.
Fig. 3 is sectional view of the diaphragm carburetor in open position of the present invention.
Fig. 4 is sectional view of the diaphragm carburetor in closed position of the present invention.
Fig. 5 is the position relationship represented between the downstream side main body access of diaphragm carburetor of the present invention and valve access
Figure.
Fig. 6 be represent the present invention diaphragm carburetor gaseous mixture access and air flue compared with main body access company
The chart of logical area.
Fig. 7 is the position relationship between the downstream side main body access for the diaphragm carburetor for representing conventional art and valve access
Figure.
Fig. 8 be the diaphragm carburetor for representing conventional art gaseous mixture access and air flue compared with main body access
Connect the chart of area.
Fig. 9 is the figure for the variation for representing downstream side main body access.
Specific embodiment
It is described with reference to the embodiment of the diaphragm carburetor of the present invention.Diaphragm carburetor 1 is swept applied to stratiform
The two stroke engine (not shown) of gas formula.
As shown in Figure 1, diaphragm carburetor 1 includes：Block-like main body 2 has columnar centered on axis A
Hole 2a；And valve member 4, with cylindrical shape and so as to the mode of rotation is accommodated in the hole 2a.In addition, in Fig. 1,
The cover 2b of the main body 2 is omitted (with reference to Fig. 2).
As shown in FIG. 1 to 3, the valve member 4, which has along the direction B orthogonal with the axis A, runs through the valve member 4
The the 1st~the 3rd valve access 20,21,22.1st~the 3rd valve access 20,21,22 along the direction of the axis A to arrange
Mode is configured and separated by two flat valve partition walls 24,25.The valve member 4 is formed by such as aluminium.The valve point
Next door 24,25 can both be integrally formed with the other parts of the valve member 4, can also be compared with the valve member 4
Other parts be separately formed after by being inserted into the other parts the methods of assemble.
The main body 2 have the upstream side of the valve member 4 respectively with 20,21,22 phase of the 1st~the 3rd valve access
The the 1st~the 3rd upstream side main body access 10a, 11a, 12a of connection and in the downstream side of the valve member 4 respectively with the described 1st~
The the 1st~the 3rd downstream side main body access 10b, 11b, 12b that 3rd valve access 20,21,22 is connected.1st~the 3rd upstream side
Main body access 10a, 11a, 12a is configured and in a manner of being arranged along the direction of the axis A by two flat upstream side masters
Body partition wall 14a, 15a are separated, and described 1st~the 3rd downstream side main body access 10b, 11b, 12b is with along the side of the axis A
It configures to the mode of arrangement and is separated by two flat downstream side main body partition wall 14b, 15b.The main body 2 is by for example
Aluminium is formed.Described upstream side main body partition wall 14a, 15a and downstream side main body partition wall 14b, 15b both can be with the main bodys 2
Other parts be integrally formed, can also the other parts compared with the main body 2 be separately formed after pass through insertion
The methods of into the other parts and assemble.
As shown in Figure 3 and Figure 4, the valve member 4 can closed position (with reference to Fig. 4) and open position (for example, referring to
Fully open position shown in Fig. 3) between pivoted about with the axis A, in the closed position, the 1st~the 3rd upstream
Side main body access 10a, 11a, 12a and the 1st~the 3rd valve access 20,21,22, the 1st~the 3rd downstream side main body access
10b, 11b, 12b are disconnected with the 1st~the 3rd valve access 20,21,22, in the open position, the 1st~the 3rd upstream side
Main body access 10a, 11a, 12a and the 1st~the 3rd valve access 20,21,22, the 1st~the 3rd downstream side main body access
10b, 11b, 12b are connected with the 1st~the 3rd valve access 20,21,22.Specifically, as depicted in figs. 1 and 2, valve drives
Axis 4a extends from the valve member 4 along the axis A, and the valve drive shaft is installed in using driver driving (not shown)
The bar 4b of 4a, so that the valve member 4 rotates.
Described 1st and the 3rd downstream side main body access 10b, 12b are connected to be led to the scavenging of two stroke engine (not shown)
The air flue (not shown) that road (not shown) is connected, positioned at the 1st downstream side main body access 10b and the 3rd downstream
The gaseous mixture access of the 2nd downstream side main body access 11b and two stroke engine (not shown) between the main body access 12b of side
(not shown) is connected.
It is sprayed as shown in Fig. 2, diaphragm carburetor 1 also has along gasification of the axis A configurations in the valve member 4
Mouth unit 30, so as to 21 spray fuel of the 2nd valve access.Gasification nozzle unit 30 is as patent document 1 is recorded
Gasification nozzle unit of the prior art.
It makes a brief explanation, gasification nozzle unit 30, which has, to be open to the 2nd valve access 21 and for spray fuel
Port 32, the port 32 is formed near the top of the spindle receiving part 33 for the tubular for being fixed in the main body 2.It is described
Gasification nozzle unit 30, which also has, is fixed on the jet element 4 and the spindle being inserted into the spindle receiving part 33
34, the insertion being inserted by changing the spindle 34 in the spindle receiving part 33 can adjust the emitted dose of fuel.
The jet element 4 can move in the hole 2a along the axis A, to change inserting for the spindle 34
Enter amount, the spindle 34 is exerted a force by the direction (direction of close port 32) of spring 35 to insertion spindle 34.In addition, according to described
Jet element 4 rotation position (that is, according to the aperture of throttle valve is corresponding, the 2nd downstream side main body access 11b and the 2nd valve
Connection area between access 21), cam 4c is correspondingly connected to bar 4b, and cam 4c is used for from the spindle receiving part
33 directions for extracting the spindle 34 overcome 35 ground of spring to push the spindle 34.Fig. 2~Fig. 4 shows the spindle 34 by certainly
The longest state (full-gear) that the spindle receiving part 33 is extracted.
As depicted in figs. 1 and 2, the compound section profile 40 and the described 1st of the 1st~the 3rd valve access 20,21,22
The compound section profile 42b of~the 3 main body downstream side access 10b, 11b, 12b, which is seemed, forms 1 passage.In addition, the described 1st
The cross section profile of~the 3 downstream side main body access 10b, 11b, 12b respectively with the 1st~the 3rd valve access 20,21,22 cut
Facial contour is consistent.The compound section profile and the described 1st~the 3rd of described 1st~the 3rd upstream side main body access 10a, 11a, 12a
The compound section profile 40 of valve access 20,21,22, which also seems, forms 1 passage, this is not illustrated.In addition, the described 1st~
The cross section profile of 3rd upstream side main body access 10a, 11a, 12a section with the 1st~the 3rd valve access 20,21,22 respectively
Profile is consistent.
The cross section profile of the 2nd downstream side main body access 11b and the 2nd valve access 21 are set, so as to
Make the 2nd downstream side main body access 11b and the 2nd valve when 4 self-closing position of valve member being made to rotate to open position
Access 21 than the 1st downstream side main body access 10b and the 1st valve access 20, the 3rd downstream side main body access 12b and
The 3rd valve access 22 first starts to connect.In the present embodiment, the compound section of the 1st~the 3rd valve access 20,21,22
Profile 40 is bent in a manner of being formed convex form on direction C orthogonal with the axis A and vertical with the direction B, described
The vertex 44 of convex form is included in the 2nd valve access 21.Similarly, the 1st~the 3rd downstream side main body access 10b,
The compound section profile 42b of 11b, 12b on direction C orthogonal with the axis A and vertical with the direction B to be formed convex
The mode of shape is bent, and the vertex 46 of the convex form is included in the 2nd downstream side main body access 11b.Specifically, it is described
Cross section profile 40,42b are circle.
Next, illustrate the effect of the diaphragm carburetor of the present invention with reference to Fig. 5 and Fig. 6.
When the 4 self-closing position of valve member starts (with reference to Fig. 4) rotation, first, as shown in (a) of Fig. 5, described the
2 valve accesses 21 are connected with the 2nd downstream side main body access 11b, afterwards, as shown in (b) of Fig. 5, the 1st and the 3rd valve
Access 20,22 is connected respectively with described 1st and the 3rd downstream side main body access 10b, 12b.Further, since the described 1st~the 3rd
Valve access 20,21,22 is arranged on the columnar valve member 4, therefore, if the cross section profile of the 2nd valve access 21 is in direction c
Scope include the 1st and the 3rd valve access 20,22 cross section profile scope in direction c, then the 2nd valve access 21 prior to
Described 1st connects with the 3rd valve access 20,22.
State shown in (a) of Fig. 5 be the 4 self-closing position of valve member (with reference to Fig. 4) rise the rotation angle of rotation compared with
The state of the low-speed region of small (aperture of throttle valve is smaller), between the 2nd downstream side main body access 11b and the 2nd valve access 21
Connect connection area and the 3rd downstream side main body that area is more than between the 1st downstream side main body access 10b and the 1st valve access 20
The summation of connection area between access 12b and the 3rd valve access 22.As a result, become the ratio compared with air of gaseous mixture
Greatly, so as to improving the accelerating ability of two stroke engine (with reference to Fig. 6).In addition, in (a) of Fig. 5, the valve member 4
It is exerted a force by the spring 35, so as to described downstream side main body partition wall 14b, 15b of the main body 2 and the institute of the valve member 4
Partition wall 24,25 is stated without fully marshalling.
State shown in (b) of Fig. 5 is the rotation angle that the 4 self-closing position of valve member is made to play rotation (with reference to Fig. 4)
The state (state for making the aperture of the throttle valve of (a) of the aperture more than Fig. 5 of throttle valve) of the rotation angle of (a) more than Fig. 5,
Connection area and the 1st downstream side main body access 10b and the 1st valve between 2nd downstream side main body access 11b and the 2nd valve access 21
The summation of the connection area between connection area and the 3rd downstream side main body access 12b and the 3rd valve access 22 between access 20
It is roughly equal.In addition, in (b) of Fig. 5, the valve member 4 is exerted a force by the spring 35, so as to the main body 2 it is described under
The partition wall 24,25 of side main body partition wall 14b, 15b and the valve member 4 is swum without fully marshalling.
In (a) of Fig. 5 and (b) of Fig. 5, between the 2nd valve access 21 and the 3rd downstream side main body access 12b
Partly connect.As a result, in a state that two stroke engine is (not shown) as sub-load, gaseous mixture passes through the described 3rd
Downstream side main body access 12b and by the scavenging access to two stroke engine (not shown) it is (not shown) supply.By using this
Point changes the shape of the cam 4c, and the fuel that can be controlled to two stroke engine supply fuel (not shown) supplies special
Property, so as to improve accelerating performance or prevent the supply characteristics deficiency of the fuel in the state of as sub-load.At this
In the case of, can be set according to purpose and arbitrarily make the 2nd valve access 21 and the 3rd downstream side main body access 12b it
Between partially communicating period.
State shown in (c) of Fig. 5 is that the rotation angle that rotation is played in the 4 self-closing position (with reference to Fig. 4) of valve member is
The state of the high-speed region of 90 degree (throttle valve is standard-sized sheet), the 2nd downstream side main body access 11b and the 2nd valve access 21
Between connection area be less than connection area between the 1st downstream side main body access 10b and the 1st valve access 20 and
The summation of connection area between the 3rd downstream side main body access 12b and the 3rd valve access 22 (with reference to Fig. 6).As a result,
Make becoming larger compared with the ratio of gaseous mixture for air, so as to (not scheme to the scavenging access of two stroke engine (not shown)
Show) fully supply scavenging air.In addition, in (c) of Fig. 5, the valve member 4 overcome the force of the spring 35 and into
Line position is moved, and the downstream side main body partition wall 14,15 of the main body 2 and the partition wall 24,25 of the valve member 4 arrange
Neatly.
From (c) of (a)~Fig. 5 of Fig. 5, in the present invention, with opening throttle valve, the 2nd downstream side main body
Connection area between access 11b and the 2nd valve access 21 is from than the 1st downstream side main body access 10b and the 1st valve
The connection area between connection area and the 3rd downstream side main body access 12b and the 3rd valve access 22 between access 20
The big state of summation reverse as state smaller than the summation of the connection area instead.
Since the diaphragm carburetor of the present invention is at the 2nd downstream side main body access (downstream side gaseous mixture main body access)
The both sides of 11b are equipped with the 1st and the 3rd downstream side main body access (downstream side air main body access) 10b, 12b, therefore, in this hair
Bright diaphragm carburetor is applied to the stratiform scavenging type that at least one scavenging access is each provided in the both sides of gaseous mixture entrance
During two stroke engine, piping structure becomes simple, therefore especially advantageous.
Next, illustrate 1 institute of patent document of the comparative example of the diaphragm carburetor as the present invention with reference to Fig. 7 and Fig. 8
The effect of the diaphragm carburetor of record.In addition, pair being labelled with attached drawing with the corresponding constitutive requirements of constitutive requirements shown in Fig. 5
Mark '.
State shown in (a) of Fig. 7 is that valve member 4 ' is made to rotate the angle identical with the valve member 4 shown in Fig. 5 (a)
The state of the smaller low-speed region of aperture of state, i.e. throttle valve.With gaseous mixture access (not shown) phase of two stroke engine
Connection the 2nd downstream side main body access 11b ' and with the 2nd corresponding 2nd valve accesses 21 ' of downstream side main body access 11b ' it
Between connection area be slightly less than the 1st downstream side main body access being connected with the air flue of two stroke engine (not shown)
10b ' and the connection area between the 1st corresponding 1st valve accesses 20 ' of downstream side main body access 10b '.As a result, mixing
The ratio compared with air of gas does not become larger, has only played the previous accelerating ability of two stroke engine (with reference to Fig. 8).
State shown in (c) of Fig. 7 is that valve member 4 ' is made to rotate the angle identical with the valve member 4 shown in Fig. 5 (c)
State, i.e. described 4 ' self-closing position (with reference to Fig. 4) of valve member play the rotation angle of rotation as 90 degree (throttle valve is standard-sized sheet)
The state of high-speed region, the connection area between the 2nd downstream side main body access 11b ' and the 2nd valve access 21 ' are smaller
Connection area between the 1st downstream side main body access 10b ' and the 1st valve access 20 '.As a result, air is opposite
Do not become larger in the ratio of gaseous mixture, only played the previous accelerating ability of two stroke engine (with reference to Fig. 8).
It is always the described 2nd when throttle valve is opened in patent document 1 from (c) of (a)~Fig. 7 of Fig. 7
Connection area between downstream side main body access 11b ' and the 2nd valve access 21 ' is less than the 1st downstream side main body access
The state of connection area between 10b ' and the 1st valve access 20 '.
Embodiments of the present invention are this concludes the description of, but the present invention is not limited to above embodiment, and can be
It is made various changes in the range of invention recorded in claims, it goes without saying that the various changes are also contained in the present invention
In the range of.
In said embodiment, the compound section profile of described 1st~the 3rd downstream side main body access 10b, 11b, 12b
The compound section profile 40 of 42b and the 1st~the 3rd valve access 20,21,22 is circle, but as long as making the valve member 4
During self-closing position (with reference to Fig. 4) rotation, first, the 2nd valve access 21 is connected with the 2nd downstream side main body access 11b
Logical, afterwards, the 1st and the 3rd valve access 20,22 is connected respectively with described 1st and the 3rd downstream side main body access 10b, 12b,
Then the cross section profile 40,42b can be arbitrary shapes, can also be as example, cross section profile 40,42b or the ellipse
As shown in Figure 9, the cross section profile of the 1st and the 3rd downstream side main body access 50,52 is triangle, the 2nd downstream side main body access 51
Cross section profile be rectangle.
In said embodiment, the upstream side air is used with main body access 10a, 12a and the upstream side gaseous mixture
It is separated between main body access 11a by flat main body partition wall 14a, 15a, if but not from two stroke engine (not
Diagram) returning for gaseous mixture blow, then can also omit upstream side main body partition wall 14a, 15a, i.e. upstream side main body access 10a,
11a, 12a can also be the single accesses of no partition wall.
In said embodiment, the cross section profile difference of described 1st~the 3rd upstream side main body access 10a, 11a, 12a
It is consistent with the cross section profile of the 1st~the 3rd valve access 20,21,22, but as long as can to the 1st~the 3rd valve access 20,
21st, the 22 an adequate amount of air of supply, and the cross section profile can be arbitrary.
Reference sign
1st, diaphragm carburetor；2nd, main body；2a, hole；4th, valve member；10a, the 1st upstream side main body access (upstream side main body
Access)；10b, the 1st downstream side main body access (downstream side air main body access)；11a, the 2nd upstream side main body access (upstream
Side main body access)；11b, the 2nd downstream side main body access (downstream side gaseous mixture main body access)；12a, the 3rd upstream side main body are led to
Road (upstream side main body access)；12b, the 3rd downstream side main body access (downstream side air main body access)；14a, 15a, upstream side
Main body partition wall；14b, 15b, the main body partition wall in downstream side；20th, the 1st valve access (air valve access)；21st, the 2nd valve leads to
Road (gaseous mixture valve access)；22nd, the 3rd valve access (air valve access)；24th, 25, valve partition wall；30th, gasification nozzle unit；
32nd, port；40th, the compound section profile of valve access；The compound section profile of 42b, downstream side main body access；44th, 46, vertex；
A, axis；B, the direction orthogonal with axis A；C, direction orthogonal with axis A and perpendicular with axis B.
Claims (8)
1. a kind of diaphragm carburetor is the diaphragm carburetor (1) of the two stroke engine applied to stratiform scavenging type,
It is characterized in that,
The diaphragm carburetor includes：
Block-like main body (2) has the columnar hole (2a) centered on axis (A)；
Valve member (4), with cylindrical shape and so as to the mode of rotation is accommodated in the hole (2a)；And
Gasification nozzle unit (30), along the axis (A) configuration in the valve member (4),
The valve member (4) has along the air for running through the valve member (4) in the 1st direction (B) orthogonal with the axis (A)
With valve access (20,22) and gaseous mixture valve access (21), the gasification nozzle unit (30) has to the gaseous mixture valve
Access (21) is open and for the port (32) of spray fuel, and the main body (2) has in the upstream side of the valve member (4) point
The upstream side main body access not being connected with the air with valve access (20,22) and the gaseous mixture with valve access (21)
(10a, 11a, 12a) and the downstream side of the valve member (4) respectively with air valve access (20,22) and described mixed
Close downstream side air main body access (10b, 12b) and the downstream side gaseous mixture main body access that gas is connected with valve access (21)
(11b),
The valve member (4) can be pivoted about with the axis (A) between the open position and the closed position, at this
Open position, the air with valve access (20,22) and gaseous mixture valve access (21) respectively with the downstream side air
It is connected with main body access (10b, 12b) with the downstream side gaseous mixture with main body access (11b), and the air valve leads to
Road (20,22) and the gaseous mixture are connected with valve access (21) with the upstream side main body access (10a, 11a, 12a) respectively,
In the closed position, the air with valve access (20,22) and gaseous mixture valve access (21) respectively with the downstream side
Air is disconnected with main body access (10b, 12b) and the downstream side gaseous mixture main body access (11b), and the air valve
Access (20,22) and the gaseous mixture are disconnected with valve access (21) with the upstream side main body access (10a, 11a, 12a) respectively,
The diaphragm carburetor (1) is following single-channel type rotary carburetor：The air valve access (20,22) and institute
It states gaseous mixture to be separated by flat valve partition wall (24,25) between valve access (21), and the downstream side air is used
Main body access (10b, 12b) and the downstream side gaseous mixture between main body access (11b) by flat main body partition wall
(14b, 15b) is separated,
The downstream side air is each provided with two with main body access (10b, 12b) and the air with valve access (20,22), and
And the downstream side air configures the institute in the downstream side gaseous mixture main body access (11b) with main body access (10b, 12b)
Axis (A) direction both sides are stated, the air configures the axis in gaseous mixture valve access (21) with valve access (20,22)
Line (A) direction both sides,
The downstream side gaseous mixture is set with main body access (11b) and the gaseous mixture with the cross section profile of valve access (21)
It is fixed, to lead to the downstream side gaseous mixture main body when the valve member (4) self-closing position is made to rotate to open position
Road (11b) and the gaseous mixture are with valve access (21) than the downstream side air main body access (10b, 12b) and the air
First start to connect with valve access (20,22),
Two downstream side air with the cross section profile of main body access (10b, 12b) and two air valve accesses (20,
22) cross section profile is consistent.
2. diaphragm carburetor according to claim 1, which is characterized in that
The air with the compound section profile (42) of valve access (20,22) and gaseous mixture valve access (21) have with
On and the 2nd direction (C) that intersects with the 1st direction (B) orthogonal with the axis (A) in a manner of convex form curved profile, institute
The vertex (42a) for stating convex form is included in the gaseous mixture valve access (21).
3. diaphragm carburetor according to claim 2, wherein,
The compound section profile (42) of the air valve access (20,22) and the gaseous mixture valve access (21) is circle.
4. diaphragm carburetor according to claim 2, wherein,
The compound section profile (42) of the air valve access (20,22) and the gaseous mixture valve access (21) is ellipse
Shape.
5. diaphragm carburetor according to any one of claim 1 to 4, wherein,
The valve member (4) can be mobile along the axis (A) in the hole (2a), in the valve member (4) self-closing
Position was risen at least a period of time during being moved to until fully open position, the gaseous mixture with valve access (21) with it is described under
Trip side air is partly connected with main body access (10b, 12b).
6. diaphragm carburetor according to any one of claim 1 to 4, wherein,
The upstream side main body access have respectively with the air valve access (20,22) and gaseous mixture valve access
(21) the upstream side air main body access (10a, 12a) and upstream side gaseous mixture main body access (11a) being connected, it is described on
Swim side air between main body access (10a, 12a) and the upstream side gaseous mixture main body access (11a) by flat master
Body partition wall (14a, 15a) separates.
7. diaphragm carburetor according to claim 5, wherein,
The upstream side main body access have respectively with the air valve access (20,22) and gaseous mixture valve access
(21) the upstream side air main body access (10a, 12a) and upstream side gaseous mixture main body access (11a) being connected, it is described on
Swim side air between main body access (10a, 12a) and the upstream side gaseous mixture main body access (11a) by flat master
Body partition wall (14a, 15a) separates.
8. a kind of diaphragm carburetor is to be applied to be each provided at least one scavenging access in the both sides of gaseous mixture entrance
The diaphragm carburetor (1) of the two stroke engine of stratiform scavenging type, which is characterized in that
The diaphragm carburetor includes：
Block-like main body (2) has the columnar hole (2a) centered on axis (A)；
Valve member (4), with cylindrical shape and so as to the mode of rotation is accommodated in the hole (2a)；And
Gasification nozzle unit (30), along the axis (A) configuration in the valve member (4),
The valve member (4) has along the air for running through the valve member (4) in the 1st direction (B) orthogonal with the axis (A)
With valve access (20,22) and gaseous mixture valve access (21), the gasification nozzle unit (30) has to the gaseous mixture valve
Access (21) is open and for the port (32) of spray fuel, and the main body (2) has in the upstream side of the valve member (4) point
The upstream side main body access not being connected with the air with valve access (20,22) and the gaseous mixture with valve access (21)
(10a, 11a, 12a), in the downstream side of the valve member (4) respectively with the air valve access (20,22) and described mixing
The downstream side air main body access (10b, 12b) and downstream side gaseous mixture main body access that gas is connected with valve access (21)
(11b),
The valve member (4) can be pivoted about with the axis (A) between the open position and the closed position, at this
Open position, the air with valve access (20,22) and gaseous mixture valve access (21) respectively with the downstream side air
It is connected with main body access (10b, 12b) with the downstream side gaseous mixture with main body access (11b), and the air valve leads to
Road (20,22) and the gaseous mixture are connected with valve access (21) with the upstream side main body access (10a, 11a, 12a) respectively,
In the closed position, the air with valve access (20,22) and gaseous mixture valve access (21) respectively with the downstream side
Air is disconnected with main body access (10b, 12b) and the downstream side gaseous mixture main body access (11b), and the air valve
Access (20,22) and the gaseous mixture are disconnected with valve access (21) with the upstream side main body access (10a, 11a, 12a) respectively,
The diaphragm carburetor (1) is following single-channel type rotary carburetor：The air valve access (20,22) and institute
It states gaseous mixture to be separated by flat valve partition wall (24,25) between valve access (21), and the downstream side air is used
Main body access (10b, 12b) and the downstream side gaseous mixture between main body access (11b) by flat main body partition wall
(14b, 15b) is separated,
The downstream side air is each provided with two with main body access (10b, 12b) and the air with valve access (20,22), and
And the downstream side air configures the institute in the downstream side gaseous mixture main body access (11b) with main body access (10b, 12b)
Axis (A) direction both sides are stated, the air configures the axis in gaseous mixture valve access (21) with valve access (20,22)
Line (A) direction both sides.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013212981A JP6191036B2 (en) | 2013-10-10 | 2013-10-10 | Rotary type vaporizer |
| JP2013-212981 | 2013-10-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104564428A CN104564428A (en) | 2015-04-29 |
| CN104564428B true CN104564428B (en) | 2018-06-05 |
Family
ID=51687887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410532672.7A Active CN104564428B (en) | 2013-10-10 | 2014-10-10 | Diaphragm carburetor |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9422890B2 (en) |
| EP (1) | EP2860382B1 (en) |
| JP (1) | JP6191036B2 (en) |
| CN (1) | CN104564428B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD779562S1 (en) * | 2015-07-21 | 2017-02-21 | Tajm, Llc | Carburetor booster |
| JP2018091235A (en) * | 2016-12-02 | 2018-06-14 | 株式会社やまびこ | Portable engine work machine and rotary type carburetor incorporated into the same |
| JP7242322B2 (en) * | 2019-02-06 | 2023-03-20 | 株式会社やまびこ | Starting fuel supply device and engine working machine |
| GB2598146B (en) * | 2020-08-21 | 2022-11-09 | Caterpillar Energy Solutions Gmbh | Rotary valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818366A (en) * | 2005-01-11 | 2006-08-16 | 沃尔布罗发动机使用有限责任公司 | Diaphragm carburetor |
| CN1869425A (en) * | 2005-02-02 | 2006-11-29 | 沃尔布罗发动机使用有限责任公司 | Engine start device of a rotary valve carburetor |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004061397B4 (en) | 2004-12-21 | 2015-06-11 | Andreas Stihl Ag & Co. Kg | Roller carburetor with air duct and mixture channel |
| US7325791B2 (en) * | 2005-09-15 | 2008-02-05 | Zama Japan Co., Ltd. | Carburetor for stratified scavenging two-cycle engine |
| JP2008069767A (en) * | 2006-08-17 | 2008-03-27 | Walbro Japan Inc | Carburetor for stratified scavenging |
| JP4696058B2 (en) * | 2006-12-27 | 2011-06-08 | ザマ・ジャパン株式会社 | Rotor shape of 2-bore rotary carburetor for stratified scavenging engine |
| JP5088955B2 (en) * | 2008-02-04 | 2012-12-05 | 株式会社やまびこ | Air cleaner for stratified scavenging two-cycle internal combustion engine |
| JP2009185695A (en) * | 2008-02-06 | 2009-08-20 | Walbro Japan Inc | Layered scavenging carburetor |
| JP2010043560A (en) * | 2008-08-11 | 2010-02-25 | Yamabiko Corp | Two-cycle engine |
| DE102009030593B4 (en) * | 2009-06-26 | 2018-08-02 | Andreas Stihl Ag & Co. Kg | Carburetor and two-stroke engine with a carburetor |
| EP2492486A1 (en) * | 2009-10-21 | 2012-08-29 | Husqvarna Zenoah Co., Ltd. | Stratified scavenging two-cycle engine and carburetor |
| EP2638274B1 (en) * | 2010-11-08 | 2016-06-22 | Husqvarna Zenoah Co., Ltd. | Air supply device of stratified scavenging two-cycle engine |
-
2013
- 2013-10-10 JP JP2013212981A patent/JP6191036B2/en not_active Expired - Fee Related
-
2014
- 2014-10-09 EP EP14188222.5A patent/EP2860382B1/en not_active Not-in-force
- 2014-10-10 US US14/511,385 patent/US9422890B2/en active Active
- 2014-10-10 CN CN201410532672.7A patent/CN104564428B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818366A (en) * | 2005-01-11 | 2006-08-16 | 沃尔布罗发动机使用有限责任公司 | Diaphragm carburetor |
| CN1869425A (en) * | 2005-02-02 | 2006-11-29 | 沃尔布罗发动机使用有限责任公司 | Engine start device of a rotary valve carburetor |
Also Published As
| Publication number | Publication date |
|---|---|
| US9422890B2 (en) | 2016-08-23 |
| EP2860382A1 (en) | 2015-04-15 |
| JP6191036B2 (en) | 2017-09-06 |
| JP2015075055A (en) | 2015-04-20 |
| EP2860382B1 (en) | 2017-04-05 |
| CN104564428A (en) | 2015-04-29 |
| US20150102511A1 (en) | 2015-04-16 |
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